Novel bolt

Abstract

The utility model discloses a novel bolt, which comprises a main body comprising a threaded section and a middle section connected with the threaded section; the head part is connected with the middle section, and the radial size of the head part is larger than that of the main body; and the extension piece is arranged outside the middle section in a sleeving mode and connected with the head, a containing cavity is formed between the extension piece and the middle section, and a vibration reduction piece arranged outside the middle section in a sleeving mode is arranged in the containing cavity. By arranging the extending piece, the extending piece abuts against the connecting piece in the installation process, the distance between the head and the connecting piece is increased, and therefore vibration force borne by the head is reduced, in addition, the vibration reduction piece is arranged in the containing cavity between the extending piece and the middle section, the vibration force borne by the head is further reduced, and the service life of the head is prolonged. And the connecting part of the middle section and the head part has a good damping effect, so that the bolt is not easy to deflect due to the vibration of the head part.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a novel bolt. Background Art

[0002] With the development of science and technology, manufacturing products are diverse, and these mechanical products usually require fasteners to connect and fix different parts.

[0003] However, during the use of these products, due to the influence of vibration, the fasteners become loose, thereby causing the connected parts to become loose, affecting the connection stability and service life of the products.

[0004] The connection stability of fasteners is particularly important for large products with safety risks. For example, vehicles such as cars, high-speed trains, and airplanes are prone to vibration, which can easily cause fasteners to loosen and cause safety risks. The connection stability of fasteners is even more important.

[0005] The inventors discovered that in the prior art, during installation, the bolt passes through the connecting piece and extends downward from the connecting piece, and the bolt head directly abuts the connecting piece or is connected to the connecting piece through a gasket. When vibration occurs, the head is close to the connecting piece and is easily affected by the vibration, causing the entire bolt to vibrate and sway, which can easily cause the bolt connection to loosen and affect the connection stability of the bolt. Utility Model Content

[0006] The utility model provides a novel bolt, comprising:

[0007] A main body, comprising a threaded section and an intermediate section connected to the threaded section;

[0008] A head connected to the middle section, wherein the radial dimension of the head is greater than the radial dimension of the main body;

[0009] An extension piece is sleeved outside the middle section and connected to the head. A receiving cavity is formed between the extension piece and the middle section. A vibration damping piece sleeved outside the middle section is arranged in the receiving cavity.

[0010] In some embodiments, the middle section is radially recessed with a middle glue injection groove, and the middle glue injection groove at least partially overlaps with the accommodating cavity along the radial direction.

[0011] In some embodiments, at least one of the middle glue injection grooves completely overlaps with the accommodating cavity in the radial direction;

[0012] The groove width b2 of the middle glue injection groove along the axial direction and the width b3 of the accommodating cavity along the axial direction are configured to be 0.2b3≤b2.

[0013] In some embodiments, the extension piece is connected to the head portion.

[0014] In some embodiments, the middle section is radially recessed with a middle glue injection groove, a plurality of the middle glue injection grooves are distributed at intervals along the axial direction, and at least one of the middle glue injection grooves is located outside the extension piece.

[0015] In some embodiments, the middle glue injection grooves are provided with a plurality of intermediate glue injection grooves spaced apart along the axial direction;

[0016] The axial spacing distance d8 between adjacent intermediate glue injection grooves and the distance d9 from the intermediate glue injection groove to the head portion are configured to be d9≤d8≤3d9;

[0017] And / or, the distance d10 from the middle glue injection groove to the threaded section and the axial spacing distance d8 between adjacent middle glue injection grooves are configured to be d10≤d8≤3d10.

[0018] In some embodiments, the vibration damping member protrudes out of the extension member on one side close to the threaded section, and the radial thickness of the vibration damping member is smaller than the radial thickness of the accommodating cavity.

[0019] In some embodiments, the vibration dampening member protrudes out of the extending member by 0.3 mm-1 mm.

[0020] In some embodiments, the extension piece is coated with a vibration-damping rubber layer on one side close to the threaded section.

[0021] In some embodiments, the extension is integrally connected to the head.

[0022] Beneficial effects of the utility model:

[0023] The utility model provides an extension piece so that when installed, the extension piece abuts against the connecting piece. At this time, the extension piece is located between the connecting piece and the head, increasing the distance between the head and the connecting piece, thereby reducing the vibration force on the head. In addition, a vibration damping piece is provided in the accommodating cavity between the extension piece and the middle section, thereby further reducing the vibration force on the head, and making the connecting portion between the middle section and the head have a good vibration damping effect, so that the bolt is not easy to swing due to the vibration of the head, and the bolt is not easy to loosen, which is beneficial to enhancing the connection stability of the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a bolt assembly according to an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the exploded structure of a bolt assembly according to an embodiment of the present utility model;

[0026] Figure 3 for Figure 2 A cross-sectional view of

[0027] Figure 4 This is a structural schematic diagram of a nut and an insulating tube according to an embodiment of the utility model;

[0028] Figure 5 This is a schematic structural diagram of a nut according to an embodiment of the utility model;

[0029] Figure 6 A cross-sectional view of a nut according to an embodiment of the present utility model;

[0030] Figure 7 This is a schematic structural diagram of a bolt and an extension member of another embodiment of the utility model;

[0031] Figure 8 for Figure 7 sectional view of .

[0032] Description of reference numerals:

[0033] 100. Bolt assembly;

[0034] 10. nut; 11. body; 12. internal thread section; 13. connecting section; 131. first groove; 132. second groove; 14. through hole;

[0035] 20. Bolt; 21. Main body; 211. External thread section; 212. Middle section; 22. Head

[0036] 30. Insulation tube;

[0037] 40. Extensions;

[0038] 50. Vibration damping parts;

[0039] c1, first glue injection groove; c2, second glue injection groove; c3, middle glue injection groove.

[0040] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0042] With respect to existing fasteners, the inventors have found that fasteners are usually made of rigid parts to ensure the structural strength and connection strength of the fasteners. However, when subjected to vibration stress, the fasteners are easily loosened from other connecting parts due to the rigid stress.

[0043] In this case, the inventors found that when the fastener is subjected to vibration force, the thread teeth of the threaded section are easily subjected to force vibration and easy to wear, so that the connection between the threaded section and the connecting piece becomes loose. The first glue injection groove c1 at least partially passes through the thread teeth of the threaded section in the axial direction, and the second glue injection groove c2 is concavely arranged in the threaded section from the outside to the inside in the radial direction, and the second glue injection groove c2 at least extends to the bottom of the thread teeth groove of the threaded section, so that the thread teeth of the threaded section have rigid and flexible materials, and the thread teeth of the threaded section are damped and buffered in both the circumferential and axial directions, and the bottom of the thread teeth can be damped and buffered, so that the threaded section has good damping and buffering capabilities to absorb the vibration force of the buffering thread teeth structure, thereby improving the service life of the thread teeth. In addition, the first glue injection groove c1 and the second glue injection groove c2 are arranged at intervals along the circumferential direction. At this time, the first glue injection groove c1 and the second glue injection groove c2 do not interfere with each other, so that the first glue injection groove c1 and the second glue injection groove c2 can perform more comprehensive vibration reduction on the threaded segment at different positions, further enhancing the vibration reduction effect on the threaded segment. The first glue injection groove c1 and the second glue injection groove c2 make the fasteners not easy to loosen, and enhance the connection stability of the fasteners. Especially when used in vehicles, the setting of the first glue injection groove c1 and the second glue injection groove c2 can significantly reduce the vibration force generated by the vehicles, the bolt assembly 100 is not easy to loosen with the connection, the connection stability of the fasteners is good, and the safety risks are greatly reduced.

[0044] The fastener may be a bolt 20 or a nut 10 or a screw or other fasteners with threads, which are not limited here and can be set as needed.

[0045] like Figure 1 and Figure 3 As shown, in this embodiment, the fastener is a bolt assembly 100, which includes a nut 10 and a bolt 20. The bolt 20 passes through a connecting piece (not shown), and the portion of the bolt 20 passing through the connecting piece is threadedly connected to the nut 10.

[0046] like Figures 3 to 6 As shown, in this embodiment, the nut 10 includes a body 11 , which includes an internal thread section 12 and a connecting section 13 connected to the internal thread section 12 , and a through hole 14 penetrating the internal thread section 12 and the connecting section 13 is provided in the body 11 .

[0047] like Figures 3 to 6As shown, the internal thread segment 12 is recessed with a first glue injection groove c1 and a second glue injection groove c2 for glue injection, the first glue injection groove c1 at least partially passes through the thread of the internal thread segment 12 along the axial direction, the second glue injection groove c2 is recessed in the internal thread segment 12 from the outside to the inside along the radial direction, and the second glue injection groove c2 extends at least to the bottom of the thread groove of the internal thread segment 12, and the first glue injection groove c1 and the second glue injection groove c2 are arranged at intervals along the circumferential direction. Among them, the nut 10 is a cylindrical structure. During the vibration process, the nut 10 is prone to resonance effect, and the thread is easily affected by vibration and the connection is loose, affecting the connection stability of the nut 10 and the bolt 20. The first glue injection groove c1 at least partially passes through the thread of the internal thread segment 12 along the axial direction, and the second glue injection groove c2 is recessed in the internal thread segment 12 from the outside to the inside along the radial direction, and the second glue injection groove c2 at least extends to the bottom of the thread groove of the internal thread segment 12, so that the thread of the internal thread segment 12 has rigid and flexible materials, and the thread of the internal thread segment 12 is damped and buffered in both the circumferential and axial directions, and the bottom of the thread is damped and buffered, so as to ensure that the internal thread segment 12 has good vibration damping and buffering capacity on the premise of having rigid strength to absorb the vibration force of the buffer thread structure, reduce the resonance effect, and increase the service life of the thread. In addition, the first glue injection groove c1 and the second glue injection groove c2 are arranged at intervals along the circumferential direction, and the first glue injection groove c1 and the second glue injection groove c2 do not interfere with each other, so that the first glue injection groove c1 and the second glue injection groove c2 can perform more comprehensive vibration reduction on the internal thread segment 12 at different positions, further enhancing the vibration reduction effect on the internal thread segment 12, so that the nut 10 is not easy to loosen, and the connection stability of the nut 10 is enhanced. There are multiple glue injection grooves distributed in an annular manner along the circumferential direction, which is conducive to enhancing the vibration reduction effect.

[0048] like Figures 3 to 6 As shown, at least one first glue injection groove c1 axially penetrates the thread of the internal thread section 12 away from the connecting section 13. Among them, the aperture d1 and the thread height h1 of the first glue injection groove c1 are configured as 0.2h1≤d2≤1.5h1, so as to ensure that the aperture of the first glue injection groove c1 is large for glue pouring, and the first glue injection groove c1 has a good vibration reduction effect. Preferably, the aperture d1 and the thread height h1 of the first glue injection groove c1 are configured as 0.25h1<d2<0.5h1, so that the rigid structure of the thread is relatively complete, which is conducive to better strength of the thread structure. Preferably, the thread height h1 is greater than or equal to 0.5mm.

[0049] like Figure 4 and Figure 5As shown, in this embodiment, the cross-section of the first glue injection groove c1 is a cut circle, and the top width of the first glue injection groove c1 near the screw thread is greater than the bottom width for easy processing. In other embodiments, the cross-section of the first glue injection groove c1 can be square, or other shapes, which are not limited here and are set as needed. In other embodiments, the top width of the first glue injection groove c1 near the screw thread can be smaller than the bottom width, so that when the glue is poured, the glue can be better retained in the first glue injection groove c1, and the screw thread at the first glue injection groove c1 can be kept more complete, thereby increasing the structural strength of the screw thread and maintaining a good thread locking force.

[0050] like Figure 3 and Figure 4 As shown, at least one second glue injection groove c2 passes through the internal thread of the internal thread section 12 from the outside to the inside in the radial direction to communicate with the through hole 14, so that the glue in the second glue injection groove c2 directly has a vibration reduction effect on the internal thread, further enhancing the vibration reduction effect. A plurality of second glue injection grooves c2 are arranged at intervals along the axial direction, and a plurality of second glue injection grooves c2 are arranged at intervals along the circumferential direction. The circumferential spacing d2 between two adjacent second glue injection grooves c2 and the axial spacing d3 between two adjacent second glue injection grooves c2 are configured as: d3<d2<3d3, so that there are more second glue injection grooves c2 and the spacing is smaller, forming a honeycomb structure to enhance the vibration reduction effect. In this embodiment, the second glue injection grooves c2 are arranged in two rows at intervals along the axial direction, and the second glue injection grooves c2 are arranged in 12 rows at intervals along the circumferential direction.

[0051] like Figure 3 , Figure 4 and Figure 6 As shown, in this embodiment, the cross-sectional dimension of the second glue injection groove c2 is smaller than the cross-sectional dimension of the first glue injection groove c1, so as to enhance the vibration reduction effect of the screw thread structure under the premise of ensuring the structure of the internal thread section 12. In other embodiments, the cross-sectional dimension of the second glue injection groove c2 may be greater than or equal to the cross-sectional dimension of the first glue injection groove c1, which is not limited here and is set as needed. Preferably, for the convenience of processing, the internal thread aperture of the nut 10 is greater than or equal to 20 mm, and the pitch is greater than or equal to 2 mm.

[0052] like Figure 1 , Figure 2 and Figure 5 As shown, a plurality of first glue injection grooves c1 and second glue injection grooves c2 are arranged at intervals along the circumferential direction, which is beneficial to strengthen the multiple vibration reduction of the internal thread section 12 and has a better vibration reduction effect.

[0053] In other embodiments, only the first glue injection groove c1 or the second glue injection groove c2 may be provided, which is not limited here and can be provided as required.

[0054] like Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the connecting section 13 is radially recessed with a first groove 131 for glue injection relative to the through hole 14. A plurality of first grooves 131 are arranged at intervals along the axial direction, and the axial spacing d3 of adjacent second glue injection grooves c2 and the axial spacing d4 of adjacent first grooves 131 are configured as d4<d3<2d4, so that more second glue injection grooves c2 and first grooves 131 are arranged under the premise of ensuring the structural strength of the nut 10, further enhancing the vibration reduction effect. The axial width b1 of the first groove 131 and the spacing d5 between adjacent screw teeth are configured as d5≤b1<3d5. The radial depth h2 of the first groove 131 and the wall thickness h3 of the connecting section 13 are configured as h2≥0.24h3, so that the first groove 131 can be injected with more glue to enhance the vibration reduction effect. The cross-sectional size of the first groove 131 is larger than the cross-sectional size of the glue injection groove, so that the vibration reduction effect of the connecting section 13 is better.

[0055] like Figure 4 As shown, in this embodiment, the first groove 131 radially passes through the wall thickness of the connecting section 13. In some embodiments, the first groove 131 can also be configured not to pass through the wall thickness of the connecting section 13 radially, and h2 is configured as 0.5d5≤h2≤1.2d5, so that the structural strength of the connecting section 13 is better.

[0056] like Figure 2 As shown, a plurality of first grooves 131 are provided at intervals along the circumferential direction, and a plurality of first grooves 131 are provided at intervals along the axial direction. The circumferential spacing d6 between two adjacent first grooves 131 and the axial spacing d4 between two adjacent first grooves 131 are configured as d4<d6<3d4, so that more first grooves 131 are provided to enhance the vibration reduction effect. In this case, the first glue injection groove c1, the second glue injection groove c2 and the first groove 131 are provided on the nut 10 to form a honeycomb structure as a whole, which forms multiple buffer absorption for the vibration force, so that the vibration reduction effect is better.

[0057] like Figures 3 to 6 As shown, a second groove 132 is recessed at one end of the connecting section 13 away from the internal thread section 12. The radial dimension of the second groove 132 is larger than the aperture of the through hole 14. The second groove 132 is used to install the insulating tube 30, so that when the bolt assembly 100 is connected to a live connector, the nut 10 and the bolt 20 are insulated, thereby reducing electrical corrosion between the nut 10 and the bolt 20 and improving the connection stability and service life of the bolt assembly 100.

[0058] like Figure 4 and Figure 6 As shown, the recessed depth d7 of the second groove 132 relative to the inner wall of the through hole 14 and the radial depth h2 of the first groove 131 are configured as d7<h2, so as to ensure that the structural strength of the nut 10 is good.

[0059] Furthermore, the insulating cylinder 30 is made of a flexible material to have a vibration reduction effect. One end of the insulating cylinder 30 away from the internal thread section 12 protrudes out of the connection section 13 by 0.3mm-1mm. In this case, when the nut 10 is locked on the bolt 20, the insulating cylinder 30 is compressed in the axial direction, so that the screw has a greater pressing effect on the connecting piece, thereby enhancing the connection stability between the bolt assembly 100 and the connecting piece. The inner diameter of the insulating cylinder 30 exceeds the outer diameter of the external thread of the bolt 20 by 0.1mm-0.3mm, so that when the bolt 20 passes through the nut 10, the insulating cylinder 30 is compressed radially outward, so that the nut 10 has a greater pressing force on the bolt 20, thereby enhancing the connection stability between the bolt 20 and the nut 10.

[0060] In addition, during the vibration process, the vibration force is usually transmitted from the connecting piece to the axial ends of the bolt assembly 100. In this process, since the first groove 131 provided in the connecting section 13 is filled with glue, most of the vibration force passing through the connecting section 13 is buffered and absorbed, so that the vibration force reaching the internal thread section 12 is smaller, and the connection part between the internal thread section 12 and the bolt 20 is less likely to loosen, and its connection stability is better. Further, the insulating cylinder 30 is a flexible material, such as a rubber material, so that the buffering and absorbing ability of the connecting section 13 for the vibration force is stronger. Furthermore, since the internal thread section 12 is also provided with a glue injection groove, the vibration force of the internal thread section 12 is further buffered and absorbed, and the vibration reduction effect is more significant. The setting of the first glue injection groove c1 and the second glue injection groove c2 buffers and absorbs the vibration force from the circumferential and axial directions, and the second glue injection groove c2 performs vibration reduction and buffering on the internal thread teeth, further reducing the vibration force of the internal thread section 12.

[0061] In addition, due to the vibration damping of the connecting section 13, the vibration force of the head 22 of the bolt 20 is also reduced, and the bolt assembly 100 is subjected to more uniform force in the axial direction and is not easy to shake, further making the connection between the bolt assembly 100 and the connecting piece not easy to loosen. When applied to a vehicle, the vibration damping setting of the nut 10 can significantly dampen the vibration force generated by the vehicle, and the bolt assembly 100 is not easy to loosen from the connecting piece, greatly reducing safety risks.

[0062] In other embodiments, the main body 11 may not be provided with the connecting section 13 or the connecting section 13 may not be sufficient to provide the first groove 131 . In this case, other structures of the nut 10 are adjusted accordingly as required and are not limited here.

[0063] In this embodiment, the glue material is rubber. In some embodiments, the glue material can also be plastic or resin or other materials, which are not limited here and are set as needed.

[0064] like Figures 1 to 3As shown, the bolt 20 includes a main body 21 and a head 22 connected to the main body 21, and the radial dimension of the head 22 is larger than the radial dimension of the main body 21. The main body 21 includes an external thread section 211 and a middle section 212 whose two ends are respectively connected to the external thread section 211 and the head 22, wherein the middle section 212 is not provided with threads.

[0065] like Figures 1 to 3 As shown, the external thread segment 211 is recessed with a first glue injection groove c1 and a second glue injection groove c2 for glue injection, the first glue injection groove c1 at least partially passes through the thread of the external thread segment 211 along the axial direction, the second glue injection groove c2 is recessed in the external thread segment 211 from the outside to the inside along the radial direction, and the second glue injection groove c2 extends at least to the bottom of the thread groove of the external thread segment 211, and the first glue injection groove c1 and the second glue injection groove c2 are arranged at intervals along the circumferential direction. Among them, the main body 21 of the bolt 20 is relatively long and is easily affected by vibration force and deflected, and the thread is easily worn, which causes the bolt 20 to be easily loosened, affecting the connection stability. The first glue injection groove c1 at least partially passes through the thread of the external thread segment 211 along the axial direction, and the second glue injection groove c2 is radially recessed from the outside to the inside of the external thread segment 211 and extends beyond the bottom of the thread groove, so that the thread of the external thread segment 211 has rigid and flexible materials, and the thread of the external thread segment 211 is vibration-damped and buffered in both the circumferential and axial directions, and the bottom of the thread is vibration-damped and buffered, ensuring that the external thread segment 211 has good vibration-damping and buffering capabilities on the premise of having rigid strength to absorb the vibration force of the buffer thread structure, the main body 21 is not easy to deflect, so that the thread is not easy to wear, thereby improving the service life of the thread. In addition, the first glue injection groove c1 and the second glue injection groove c2 are arranged at intervals along the circumferential direction, and at this time, the first glue injection groove c1 and the second glue injection groove c2 do not interfere with each other, so that the first glue injection groove c1 and the second glue injection groove c2 can perform more comprehensive vibration reduction on the external thread segment 211 at different positions, further enhancing the vibration reduction effect of the external thread segment 211, so that the bolt 20 is not easy to loosen, and the connection stability of the bolt 20 is enhanced. In particular, when the nut 10 and the bolt 20 both have the first glue injection groove c1 and the second glue injection groove c2, correspondingly, the vibration reduction effect is further enhanced, and their respective thread teeth are less likely to wear, thereby having good connection stability.

[0066] like Figures 1 to 3 As shown, in some embodiments, the first glue injection groove c1 can extend axially from bottom to top to the thread ends of all external thread segments 211, and the first glue injection groove c1 can also extend axially to part of the external thread segments 211. In some embodiments, the top and bottom of the first glue injection groove c1 pass through the top and bottom of the screw thread, and in some embodiments, the first glue injection groove c1 can also pass through a part of the structure of the screw thread, which is not limited here and can be set as needed.

[0067] like Figures 2 to 3As shown, the relationship between the hole diameter d1 of the first glue injection groove c1 and the thread height h1 is configured as 0.2h1≤d2≤1.5h1.

[0068] In some embodiments, the second glue injection groove c2 may only pass through the screw thread or screw thread groove in the radial direction, or the second glue injection groove c2 may also partially pass through the screw thread or screw thread groove in the radial direction. This is not limited here and is set as needed.

[0069] like Figures 1 to 3 As shown, in this embodiment, the first glue injection groove c1 passes through the thread of the lower end of the external thread segment 211 along the axial direction, and the second glue injection groove c2 passes through the thread groove between adjacent threads along the radial direction. The first glue injection groove c1 and the second glue injection groove c2 are filled with glue, and the glue material in this embodiment is rubber. In some embodiments, the glue material can also be plastic or resin or other materials, which are not limited here and are set as needed.

[0070] like Figures 1 to 3 As shown, in this embodiment, the width of the second glue injection groove c2 along the axial direction is greater than the width of the screw groove, so as to ensure that the second glue injection groove c2 can partially pass through the screw groove between adjacent screw teeth along the radial direction, and increase the amount of glue injection, and enhance the vibration reduction effect. In some embodiments, the second glue injection groove c2 can also be completely located in the screw groove, so that the screw structure can be more complete, thereby having a greater structural strength and having a good vibration reduction effect. The width of the second glue injection groove c2 along the axial direction is greater than or equal to 0.3mm, which is convenient for processing, and ensures that the glue in the second glue injection groove c2 can be filled in the second glue injection groove c2.

[0071] like Figures 1 to 3 As shown, the bottom of the first glue injection groove c1 does not exceed the bottom of the screw groove to ensure that the structural strength of the screw thread is good, which is conducive to the connection stability with the connecting piece. The depression depth of the second glue injection groove c2 relative to the screw groove is greater than the depression depth of the first glue injection groove c1, so that the second glue injection groove c2 has a larger depression depth, which is conducive to further reducing the vibration force at the bottom of the screw thread. In some embodiments, the first glue injection groove c1 can also exceed the bottom of the screw groove, which is not limited here and is set as needed.

[0072] like Figures 1 to 3As shown, there are multiple first glue injection grooves c1 and second glue injection grooves c2 distributed along the circumferential direction. Preferably, there are at least three first glue injection grooves c1 and second glue injection grooves c2 distributed along the circumferential direction. In this embodiment, there are six first glue injection grooves c1 and second glue injection grooves c2 evenly distributed along the circumferential direction, and the first glue injection grooves c1 and second glue injection grooves c2 are staggered and arranged along the circumferential direction to ensure that the structural strength of the external thread segment 211 is good, and the external thread segment 211 has more first glue injection grooves c1 and second glue injection grooves c2, which is conducive to the absorption and buffering of vibration force. In other embodiments, there are two or other numbers of first glue injection grooves c1 and second glue injection grooves c2 distributed along the circumferential direction, which are not limited here and are set as needed.

[0073] like Figures 1 to 3 As shown, the distance between adjacent first glue injection grooves c1 is greater than the distance between adjacent second glue injection grooves c2, so that the screw thread structure has better strength.

[0074] like Figures 1 to 3 As shown, the second glue injection grooves c2 are provided with multiple intervals along the axial direction to achieve a better vibration reduction effect of the external thread segment 211 and at the same time ensure a good structural strength of the external thread segment 211. In addition, the second glue injection grooves c2 are distributed with multiple circumferential and axial directions to facilitate multiple buffering of the vibration force, and the vibration reduction effect is better.

[0075] like Figures 1 to 3 As shown, the width of the first glue injection groove c1 is smaller than the width of the second glue injection groove c2 along the axial direction, so that the screw thread structure is more complete and has better structural strength and connection stability.

[0076] like Figures 1 to 3 As shown, the middle section 212 is radially recessed with an intermediate glue injection groove c3 for glue injection. Usually, the middle section 212 is at least partially located in the connecting member and is easily affected by the vibration of the connecting member. By providing the intermediate glue injection groove c3, the middle section 212 can have a vibration reduction effect, and at the same time, the force on the main body 21 is more uniform, and the main body 21 is not easily deflected by the vibration force, and the main body 21 is not easy to be loosened, so that the connection stability of the main body 21 is better.

[0077] like Figures 1 to 3 As shown, the axial width of the middle glue injection groove c3 is greater than or equal to the axial width of the second glue injection groove c2, wherein the middle section 212 is not provided with a threaded structure. In this case, the middle section 212 can have a larger margin to set the middle glue injection groove c3, so that the middle section 212 can have a larger glue injection amount and enhance the vibration reduction effect.

[0078] In this embodiment, the middle glue injection groove c3 extends in a circular shape along the circumferential direction, so that the middle glue injection groove c3 can inject more glue. In other embodiments, there may be multiple middle glue injection grooves c3 spaced apart along the circumferential direction, and the number and spacing thereof are set as required, which is not limited here.

[0079] like Figures 1 to 3 As shown, there are a plurality of intermediate glue injection grooves c3 spaced apart along the axial direction, so that the intermediate section 212 can have a larger amount of glue injection, thereby enhancing the vibration reduction effect. Preferably, there are at least three intermediate glue injection grooves c3 along the axial direction.

[0080] like Figures 1 to 3 As shown, the axial spacing distance d8 between adjacent intermediate glue injection grooves c3 and the distance d9 from the intermediate glue injection groove c3 to the head 22 are configured as d9≤d8≤3d9; and / or, the distance d10 from the intermediate glue injection groove c3 to the external thread section 211 and the axial spacing distance d8 between adjacent intermediate glue injection grooves c3 are configured as d10≤d8≤3d10, so that the structural strength of the intermediate section 212 is greater and the distance from the intermediate glue injection groove c3 to the head 22 or the external thread section 211 is smaller, so as to ensure a better vibration reduction effect at the head 22 and / or the external thread section 211. In addition, the groove width b2 of the middle glue injection groove c3 and the distance d9 from the middle glue injection groove c3 to the head 22 are configured as b2≤d9≤2b2, and / or the groove width b2 of the middle glue injection groove c3 and the distance d10 from the middle glue injection groove c3 to the external thread section 211 are configured as b2≤d10≤2b2, so as to better enhance the structural strength at the head 22 and / or the external thread section 211, and at the same time have a good vibration reduction effect.

[0081] Based on the above, the utility model provides a processing technology for fasteners, including:

[0082] S1: material preparation, preparing the blank body;

[0083] S2: glue injection groove processing, forming a first glue injection groove c1 and a second glue injection groove c2 on the blank body, and injecting glue into the first glue injection groove c1 and the second glue injection groove c2;

[0084] S3: Processing the thread segment, processing the thread segment on the blank body based on the first glue injection groove c1 and the second glue injection groove c2.

[0085] In step S1 , when the fastener is a nut 10 , the main body of the blank is a body 11 of the nut 10 having a through hole 14 ; when the fastener is a bolt 20 , the main body of the blank has a head 22 and a body 21 .

[0086] In step S2 and step S3, since the first glue injection groove c1 and the second glue injection groove c2 are set to be small in size, a drilling tool with high precision and small size is required for processing. In particular, when the relationship between the hole diameter of the first glue injection groove c1d1 and the thread height h1 is configured as d2<0.5h1, electric spark drilling is required for processing.

[0087] Then, glue is poured into the first glue injection groove c1 and the second glue injection groove c2 to facilitate the subsequent processing of the internal thread of the nut 10 or the external thread of the bolt 20. In this case, the first glue injection groove c1 and the second glue injection groove c2 are filled with glue to provide structural support for the processing of the internal thread or the external thread, thereby reducing the metal structure of the body 11 from being broken due to the processing of the internal thread or the external thread.

[0088] In this case, the positions of the first glue injection groove c1 and the second glue injection groove c2 are pre-set, and then thread processing is performed accordingly based on the positions of the first glue injection groove c1 and the second glue injection groove c2 to form the internal thread section 12 of the nut 10 or the external thread section 211 of the bolt 20.

[0089] In some embodiments, the bolt 20 may also be provided with only the external thread section 211 without the middle section 212, which is not limited here and can be provided as required.

[0090] like Figure 7 and Figure 8 As shown, in some embodiments, the bolt 20 further includes an extension member 40 sleeved outside the middle section 212 and connected to the head 22, and a receiving cavity is formed between the extension member 40 and the middle section 212, and a vibration damping member 50 sleeved outside the middle section 212 is provided in the receiving cavity. The vibration damping member 50 can be a spring or a rubber ring or a vibration damping member 50 formed by other vibration damping materials, which is not limited here. In this embodiment, the vibration damping member 50 is a rubber ring.

[0091] In the prior art, during installation, the external thread section 211 passes through the connecting piece and extends downward from the connecting piece, and the head 22 directly abuts against the connecting piece or is connected to the connecting piece through a gasket. When vibration occurs, the head 22 is close to the connecting piece and is easily affected by the vibration, resulting in the overall vibration deflection of the bolt 20, which easily causes the connection of the bolt 20 to become loose, affecting the connection stability of the bolt 20. By providing the extension member 40, during installation, the extension member 40 abuts against the connecting piece. At this time, the extension member 40 is located between the connecting piece and the head 22, increasing the distance between the head 22 and the connecting piece, thereby reducing the vibration force on the head 22. In addition, by providing the vibration damping member 50 in the accommodating cavity between the extension member 40 and the middle section 212, the vibration force on the head 22 is further reduced, and the connection portion between the middle section 212 and the head 22 has a good vibration damping effect, so that the bolt 20 is not easily deflected by the vibration of the head 22, and the bolt 20 is not easily connected and loosened, which is conducive to enhancing the connection stability of the bolt 20.

[0092] like Figure 7 and Figure 8 As shown, preferably, the axial length L1 of the extension piece 40 and the axial length L2 of the head 22 are configured to be 0.2L2≤L1≤L2, so that the overall length of the bolt 20 is not too long, and the extension piece 40 is ensured to have a sufficient length so that there is a certain distance between the head 22 and the connecting piece, thereby reducing the vibration force on the head 22.

[0093] The extension piece 40 is separately connected to the head 22 for easy processing and subsequent processing of the intermediate glue injection groove c3. The extension piece 40 and the head 22 can be separately connected by gluing, welding or abutting. In this case, the utility model provides a processing technology for the bolt 20, including:

[0094] a01: material preparation, preparation of the blank body and the formed extension 40;

[0095] a02: The extension piece 40 is sleeved on the middle section 212 and connected to the head 22;

[0096] a03: The vibration damping member 50 is placed in the accommodation cavity formed between the extension member 40 and the middle section 212 .

[0097] In step a01, the blank body has a head 22 and a body 21. When the body 21 is provided with structures such as a middle glue injection groove c3, a first glue injection groove c1, and a second glue injection groove c2, correspondingly, these structures are first processed to form the blank body.

[0098] Among them, when the extension piece 40 and the head 22 are separately connected by abutment, during installation, the extension piece 40 is first sleeved outside the middle section 212, and the vibration damping member 50 is sleeved between the extension piece 40 and the middle section 212, and then the external threaded section 211 of the bolt 20 passes through the connecting piece, and the extension piece 40 abuts against the connecting piece and the head 22 respectively after the bolt 20 and the connecting piece are tightened.

[0099] In other embodiments, the extension piece 40 and the head 22 may also be integrally connected.

[0100] The middle section 212 is radially recessed with a middle glue injection groove c3, which at least partially overlaps with the accommodating cavity in the radial direction, further making the connection between the middle section 212 and the head 22 have a good vibration reduction effect, and reducing the vibration force on the head 22. In this case, for the case where the extension piece 40 is integrally connected with the head 22, for the convenience of processing, the head 22 and the extension piece 40 are integrally formed, and the main body 21 is separately connected with the head 22. Accordingly, the processing technology of the bolt 20 includes:

[0101] b01: material preparation, preparing the first object to be processed and the second object to be processed;

[0102] b02: integrally forming the first body to be processed into a head 22 and an extension piece 40;

[0103] b03: Processing the first body to be processed into a main body 21, wherein the main body 21 includes an external thread section 211 and a middle section 212;

[0104] b04: Processing the middle glue injection groove c3 in the middle section 212;

[0105] b05: connecting the first body to be processed and the second body to be processed to form a containing cavity;

[0106] b06: Place the vibration damping member 50 in the accommodating cavity.

[0107] Among them, in step b05, the first body to be processed and the second body to be processed can be detachably connected or welded, and they can be detachably connected by means of threaded connection or shaft hole overfitting.

[0108] As shown in the figure, a plurality of intermediate glue injection grooves c3 are arranged at intervals along the axial direction, wherein the intermediate glue injection groove c3 adjacent to the head 22 completely overlaps with the accommodating cavity along the radial direction to further enhance the vibration reduction effect, and the other intermediate glue injection grooves c3 are located outside the extension member. In other embodiments, the intermediate glue injection groove c3 may also partially overlap with the accommodating cavity along the radial direction. And in other embodiments, there is at least one intermediate glue injection groove c3 located outside the extension member to perform vibration reduction and buffering on other parts of the middle section 212, so that the vibration reduction effect of the middle section 212 is more uniform. The groove width b2 of the intermediate glue injection groove c3 along the axial direction and the width b3 of the accommodating cavity along the axial direction are configured to be 0.2b3≤b2 to ensure that the intermediate glue injection groove c3 has a larger glue injection amount and enhances the vibration reduction effect.

[0109] The vibration damper 50 protrudes out of the extension piece 40 near the threaded section, and the radial thickness of the vibration damper 50 is less than the radial cavity thickness of the accommodating cavity. During the installation process, the vibration damper 50 is compressed as the bolt 20 and the connecting piece are tightened, further enhancing the connection stability between the bolt 20 and the connecting piece, and providing vibration reduction at the same time.

[0110] Preferably, the vibration damping member 50 protrudes from the extension member 40 by 0.3 mm-1 mm, so as to ensure that the vibration damping member 50 has sufficient compression and at the same time the overall length of the bolt 20 is not too long.

[0111] The radial cavity thickness h4 of the accommodating cavity and the radial thickness h5 of the extending member 40 are configured to be 2h5≤h4, so that the vibration-damping member 50 can have sufficient vibration-damping buffering space.

[0112] A vibration-damping rubber layer is coated on one side of the extension member 40 close to the threaded section to enhance the vibration-damping effect.

[0113] Preferably, the external thread size of the bolt 20 is greater than or equal to 20 mm, and the thread pitch is greater than or equal to 2 mm.

[0114] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, device, article or method including the element.

[0115] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A new type of bolt, characterized in that: include: A main body, comprising a threaded section and an intermediate section connected to the threaded section; A head connected to the middle section, wherein the radial dimension of the head is greater than the radial dimension of the main body; An extension piece is sleeved outside the middle section and connected to the head. A receiving cavity is formed between the extension piece and the middle section. A vibration damping piece sleeved outside the middle section is arranged in the receiving cavity.

2. The novel bolt according to claim 1 is characterized in that: The middle section is radially recessed with a middle glue injection groove, and the middle glue injection groove at least partially overlaps with the accommodating cavity along the radial direction.

3. The new bolt according to claim 2 is characterized in that: At least one of the middle glue injection grooves completely overlaps with the accommodating cavity in the radial direction; The groove width b2 of the middle glue injection groove along the axial direction and the width b3 of the accommodating cavity along the axial direction are configured to be 0.2b3≤b2.

4. The new bolt according to claim 1 is characterized in that: The extension piece is connected to the head portion.

5. The novel bolt according to claim 1 is characterized in that: The middle section is radially recessed with a middle glue injection groove, and a plurality of the middle glue injection grooves are distributed at intervals along the axial direction, and at least one of the middle glue injection grooves is located outside the extension piece.

6. The novel bolt according to claim 5, characterized in that: There are a plurality of intermediate glue injection grooves spaced apart along the axial direction; The axial spacing distance d8 between adjacent intermediate glue injection grooves and the distance d9 from the intermediate glue injection groove to the head portion are configured to be d9≤d8≤3d9; And / or, the distance d10 from the middle glue injection groove to the threaded section and the axial spacing distance d8 between adjacent middle glue injection grooves are configured as d10≤d8≤3d10.

7. The new bolt according to claim 1 is characterized in that: The vibration damping component protrudes out of the extension component at one side close to the threaded section, and the radial thickness of the vibration damping component is smaller than the radial cavity thickness of the accommodating cavity.

8. The new bolt according to claim 7, characterized in that: The vibration damping member protrudes out of the extension member by 0.3 mm-1 mm.

9. The novel bolt according to claim 1, characterized in that: A vibration-damping rubber layer is coated on one side of the extension piece close to the threaded section.

10. The novel bolt according to claim 1, characterized in that: The extension piece is integrally connected to the head.

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